Tanker traffic through the Strait of Hormuz tumbled since late last week, as ship owners and operators froze up amid the renewed hostilities between Iran and the US over the weekend.

The Thursday attack on the container ship Ever Lovely prompted some shipowners to pull back and wait for additional information about how safe transiting the Strait is. The U.S. military on Friday carried out strikes on Iran in response to the attack on the vessel.

Then, on Friday and Saturday, the US Central Command (CENTCOM) forces conducted strikes against multiple targets in Iran, in response to attacks on two vessels near the Strait of Hormuz. On Saturday, an Iranian attack on a Panama-flagged oil tanker, Kiku, while it was transiting the Strait of Hormuz prompted additional strikes by the U.S. forces. Kiku was carrying more than 2 million barrels of crude oil, the U.S. armed forces said.

“After yesterday’s U.S. strikes in response to the Iranian attack on M/V Ever Lovely, Iran was given a chance to honor the ceasefire agreement but elected not to when its forces launched a one-way attack drone that hit M/T Kiku this morning at 4:30 a.m. ET,” CENTCOM said on Saturday.

The attacks on commercial vessels and the U.S. retaliatory attacks on Iran continue to test not only the fragile ceasefire, but also the willingness of shipowners and operators to press on with transits through Hormuz.

Since a weekly peak of vessels transiting Hormuz on June 24, traffic has materially eased, both in the outbound and inbound directions, according to ship-tracking data by Kpler compiled by Bloomberg.

After the flare-up this weekend, the U.S. and Iran have reportedly agreed to cease attacks ahead of tentatively planned new talks this week.

Although traffic through the Strait of Hormuz has resumed and more vessels are openly broadcasting their position, a return to normality is far from certain and far from near amid persistently volatile operating conditions in the Middle East and its key shipping lane.